W x 16.9 in. D x 36.8 in.-39.8 in. HSeat size:18.5 in. DBackrest size: 18.5 in. W x 19.3 in. HHeight from ground to seat: 17.1 in. Ergonomic Design – Designed with human-oriented ergonomic construction.streamlined armrests fit the curve of your arms,allowing you to sit comfortably on a work chair.